Question

I’m creating some xslt’s using Umbraco 4.5.2 and I want to add de set:distinct function from EXSLT.org (http://www.exslt.org/set/functions/distinct/index.html) however, when I reference the set:distinct I get the error:

System.Xml.Xsl.XslTransformException:
Cannot find a script or an extension
object associated with namespace
‘http://exslt.org/sets’.

I’ve added the files, the extension in xslt and the namespace like this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet 
    version="1.0" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
    xmlns:msxml="urn:schemas-microsoft-com:xslt" 
    xmlns:exsl="http://exslt.org/functions"
    xmlns:set="http://exslt.org/sets" 
    xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" 
    exclude-result-prefixes="exsl msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets ">
<xsl:import href="set.xsl" />

Is it me that’s missing something or is it Umbraco that’s throwing the error or does some underlaying network error occur somewhere (and if so, how do I find out)?

TIA!

Answer 1

The Umbraco framework already includes the Exslt.Sets implementation, so you don’t need to add a further reference to it as above. You can see the reference to the Umbraco implementation in your code above, it looks like this:

xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets"

Remove the lines:

xmlns:exsl="http://exslt.org/functions"
xmlns:set="http://exslt.org/sets" 

and use Exslt.ExsltSets:distinct().